Taco, Inc. offers an expanded line of water conserving Plumb n' Plug cartridge circulators with optional clock timers, including a digital clock version that can be programmed for up to seven days. The cartridge circulators can save up to 25 gallons of household water per day. The models consist of 003 and 006 circulators with either a pre-wired, optional 24-hour analog or 7-day digital clock timer and a six-foot line voltage cord. Installation of the Plumb n' Plug is easy, just "plumb" it in, then "plug" it in. Taco's "00" cartridge design features no mechanical seal and a seal lubricating, replaceable cartridge. Taco, Inc.